Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 81
oth window block pests and connect one testreceiver clip to a grounded pipe, and with the other touch the bare ends of the wires alter-nately. If a click be heard in the test receiver in so touching one wire, that wire is thering side of the line. Then place one test clip on this wire (ring side)… … X *•$£ «> ■ CO o^ CO &.Jh C .Oi.£2 w G£33 <D o » «3 »0 0»Q 31. Generator feeder open. 32. Buzzer ringer coils open. 33. Buzzer relay contact does not make. Effect: Central cannot ringP.B.X. operator on anydrop. Test by followingout circuit with test re-ceiver. 34. Battery feed open.…
Electrical engineering
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